My brother had Batman, I had the Flash, and we both had Dukes of Hazzard underoos. I didn't run around outside in my underwear or anything, but we both wore the t-shirts all the time. Those blue undies became part of my brother's Batman Halloween costume one year.

As a kid, I loved Robin. The store must have been out of my size and my parents bought me what must have been the largest size. The shirt came down to my knees and I was never able to wear the underwear.

But I do have a ton of superhero underwear thanks to my local Wal-Mart (the store I love to hate). Justice League, Batman, Flash, Superman (3 different ones), Captain America, Spiderman and Wolverine...